"The Immaculate Mother of God, the ever Virgin Mary, having completed the course of her earthly life, was assumed body and soul into heavenly glory." ~ Pope Pius XII
by St. John Damascus
(Selections from the homily)
To-day the spotless Virgin, untouched by earthly affections, and all heavenly in her thoughts, was not dissolved in earth, but truly entering heaven, dwells in the heavenly tabernacles. Who would be wrong to call her heaven, unless indeed he truly said that she is greater than heaven in surpassing dignity? The Lord and Creator of heaven, the Architect of all things beneath the earth and above, of creation, visible and invisible, Who is not circumvented by place (if that which surrounds things is rightly termed place), created Himself, without human co-operation, an Infant in her. He made her a rich treasure-house of His all-pervading and alone uncircumscribed Godhead, subsisting entirely in her without passion, remaining entire in His universality and Himself uncircumscribed. To-day the life-giving treasury and abyss of charity (I know not how to trust my lips to speak of it) is hidden in immortal death. She meets it without fear, who conceived death's destroyer, if indeed we may call her holy and vivifying departure by the name of death. For how could she, who brought life to all, be under the dominion of death ? But she obeys the law of her own Son, and inherits this chastisement as a daughter of the first Adam, since her Son, who is the life, did not refuse it. As the Mother of the living God, she goes through death to Him. For if God said: "Unless the first man put out his hand to take and taste of the tree of life, he shall live for ever," how shall she, who received the Life Himself, without beginning or end, or finite vicissitudes, not live for ever. [...]
What shall we answer the tomb? You have indeed rich and abiding grace, but divine power is not restricted by place, neither is the Mother of God's working. If it were confined to the tomb alone, few would be the richer. Now it is freely distributed in all parts of the world. Let us then make our memory serve as a storehouse of God's Mother. How shall this be? She is a virgin and a lover of virginity. She is pure and a lover of purity. If we purify our mind with the body, we shall possess her grace. She shuns all impurity and impure passions. She has a horror of intemperance, and a special hatred for fornication. She turns from its allurements as from the progeny of serpents . . . She looks upon all sin as death-inflicting rejoicing in all good. Contraries are cured by contraries. She delights in fasting and continence and spiritual canticles, in purity, virginity, and wisdom. With these she is ever at peace, and takes them to her heart. She embraces peace and a meek spirit, and love, mercy, and humility as her children. In a word, she grieves over every sin, and is glad at all goodness as if it were her own. If we turn away from our former sins in all earnestness and love goodness with all our hearts, and make it our constant companion, she will frequently visit her servants, bringing all blessings with her, Christ her Son, the King and Lord who reigns in our hearts. To Him be glory, praise, honour, power, and magnificence, with the eternal Father and the Holy Spirit, now and for ever.
From the Podcast: Sing of Mary, Pure and Lowly
(Here's an interesting history behind the composition of this hymn.)